LESSON 03: Layer 2 Design Flashcards
In this lesson, you will learn about the most common FortiSwitch topologies, as well as the different loop prevention protocols and methods available on FortiSwitch. (12 cards)
What are the three layers in the three-layer hierarchy model for network design?
Core, Distribution, Access
This model is widely adopted for designing reliable, scalable, and cost-effective networks.
What is the primary role of the Core layer in the three-layer hierarchy model?
Provides reliable high-speed transport between the WAN, the internet, and the distribution layer
Speed is the most important consideration in this layer.
What types of devices can be used in the Core layer?
Layer 2 or Layer 3 devices
Devices in this layer should focus on switching, with limited routing.
What tasks should be avoided in the Core layer?
Resource-intensive tasks such as security inspection or QoS classification
These tasks are better suited for other layers.
What is the primary function of the Distribution layer?
Aggregates traffic from the access layer switches and forwards it to the core devices
This layer is also known as the smart layer.
What tasks are performed in the Distribution layer?
Inter-VLAN routing, security inspection, packet filtering, and other packet manipulation tasks
Redundancy and fault tolerance are recommended in this layer.
What types of devices can be used in the Distribution layer?
Layer 2 or Layer 3 devices
Similar to the Core layer, both types of devices are applicable.
What is the purpose of the Access layer?
Connects the endpoints: workstations, phones, access points, servers, etc.
This layer typically consists of Layer 2 switches.
What functionality does the Access layer provide besides connectivity?
VLAN segmentation, device authentication, network access control (NAC), and QoS classification
The access layer may also deliver power to personal devices using power over Ethernet (PoE).
What is a common configuration for access layer switches?
High-density port configuration
This helps reduce per-port costs.
Is redundancy and fault tolerance a requirement in the Access layer?
No
Unlike the Core and Distribution layers, it is usually not a requirement in the Access layer.
